JP2016074512A - Moving rack facility and control method for moving rack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving rack facility that allows a non-rail moving rack, which moves along a moving passage in a facility, to run appropriately without strictly detecting a degree of a postural inclination of the moving rack relative to the moving passage and a degree of a width-directional deviation thereof.SOLUTION: A moving rack facility comprises magnets 32 arranged at constant intervals along a moving passage W of a moving rack 11; a direction of a postural inclination of the moving rack 11 relative to the moving passage W and a width-directional deviation in a lateral direction orthogonal to the moving passage W are determined based on detection results of the magnets 32 by magnetic sensors 30L and 30R provided in the moving rack 11; and one driving pattern for driving wheels 14L and 14R are selected from a plurality of predetermined driving patterns according to the a direction of the postural inclination and the width-directional deviation.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a moving shelf facility having a moving shelf capable of moving on a floor surface in the facility, and a method for controlling the moving shelf.

  A moving shelf facility in which a plurality of movable shelves that can reciprocate on a traveling route as described in Patent Document 1 is conventionally known, and by using such a moving shelf facility, Even if the space inside is small, many shelves can be provided, and as a result, many articles stored in the shelves can be stored in the facility.

  The moving shelf equipment described in Patent Document 1 is a railless type, that is, a type that does not use rails. In such a rail-free type moving shelf equipment, the movement route is caused by uneven operation of the electric motor that is the driving source for movement, problems on the floor surface (dirt, unevenness, obstacles, etc.), and uneven load due to the loaded state of the shelf. The position of the moving shelf is tilted to the right or left instead of being straight with respect to the (travel route), and the moving direction of the moving shelf deviates from the original moving route. By continuing to do so, a displacement (width deviation) in the left-right direction orthogonal to the movement path may occur.

  Therefore, in the moving shelf equipment described in Patent Document 1, a magnet (magnet) as a detected object is provided at the stop position of the moving shelf, and when the moving shelf is stopped, the magnet is magnetized by the magnetic sensor. , And the presence or absence of width deviation and the degree of width deviation are detected based on whether the detected magnetic sensitivity has changed since the previous stop, and if there is a width deviation, a travel locus that reduces the width deviation is obtained by calculation. Thus, control is performed along the travel locus for which the travel of the movable shelf is obtained.

JP 2009-132490 A

However, when calculating a travel locus that reduces the width deviation, it is necessary to perform a complicated calculation as to how the movable shelf should travel. Furthermore, the optimal travel trajectory changes depending on factors such as the degree of attitude inclination and width deviation at that time, and the size of the moving shelf itself and the length of the original travel route (environmental conditions). It is necessary to strictly detect the degree of deviation (how many posture inclinations have occurred in terms of angle, or how many mm of width deviation have occurred), and in any equipment and situation. There is no travel locus that can be used for general purposes, and it has been necessary to perform calculations by changing the environmental conditions for each facility and each situation, and obtain the travel locus each time.
In addition, when detecting the width deviation by the method as described above, since the occurrence of the width deviation is detected only at the stop position, the width deviation is detected from one stop position to the next stop position. There is a risk that it will become large without being done (it will deviate significantly from the original movement route).

  Further, in the invention described in Patent Document 1, it is also possible to detect the travel amount of the drive wheels on both sides in the width direction of the movable shelf and perform correction control based on the travel amount. The detection of the travel amount is performed by detecting the rotational state of the rotating body accompanying the friction rolling of the detection wheel that is pressed against the floor surface. Even if there are slight irregularities or oil stains on the surface, the travel amount could not be detected correctly due to the idling of the detection wheel, and there was a risk that proper control could not be performed.

In view of the above, an object of the present invention is to provide a moving shelf facility that can cause the moving shelf to appropriately travel without detecting the degree of posture inclination and width deviation so precisely.
In addition, without waiting for the moving shelf to reach the stop position, it is possible to detect the posture inclination while moving and perform control accordingly, and the width deviation caused by continuing to move while the posture inclination is generated. It is also a problem to suppress the occurrence of the above.
Another object is to enable appropriate movement control even if the floor surface is not good.

In order to solve the above-mentioned problem, a mobile shelf facility according to the present invention is a mobile shelf facility having a movable shelf movable on a floor surface in the facility, and the movable shelf facility controls movement of the mobile shelf. A moving shelf control means and an index path extending along a moving path of the moving shelf are provided, and the moving shelf includes a shelf body capable of storing a load, and the moving shelf along a predetermined moving path. A plurality of driving wheels for moving the indicator wheel, and indicator road detecting means capable of detecting the indicator road, wherein the moving shelf control means includes a plurality of predetermined driving wheels. By driving with one of the drive patterns and controlling the rotational speed of each drive wheel, it is possible to move the moving shelf in any one of a plurality of predetermined movement patterns, By index road detection means Based on the detection state of the index path, the direction of the inclination of the movable shelf relative to the movement path and the width deviation direction of the movement shelf in the left-right direction orthogonal to the movement path are determined, and the direction of the attitude inclination and the direction One drive pattern to be executed is selected from a plurality of predetermined drive patterns according to the width shift direction.
According to this configuration, it is only necessary to detect the general state of the orientation and direction (rightward or leftward, rightward or leftward, etc.) without detecting the degree of posture inclination and width deviation quantitatively. It is possible to simplify the configuration of equipment for

In addition to the above configuration, the moving shelf facility according to the present invention has at least two rows in which the index path is arranged on the floor surface in the moving shelf facility at regular intervals along the moving path of the moving shelf. The indicator path detecting means comprises at least two indicator body detecting means corresponding to each of the indicator body arrays provided on one side and the other side in the left-right direction orthogonal to the movement path, and moves. The shelf control means, based on the detection state of the index body by each of the index body detection means while the movable shelf is moving, one side of the movable shelf in the direction of movement of the movable shelf The direction of the posture inclination of the moving shelf with respect to the moving path may be determined by determining whether it is ahead of the other side, is delayed, or is not ahead or delayed.
According to this configuration, it is possible to know whether or not the inclination of the movable shelf has occurred while moving, so that it is possible to respond to the inclination of the movable shelf without waiting for the stop position. Control can be performed.

In addition to the above configuration, the moving shelf facility according to the present invention includes at least two rotation amount detection means for detecting at least two rotation amounts of the plurality of driving wheels, respectively, and the moving shelf detects each indicator body. And when any one of the index body detection means detects the index body while the movable shelf is moving, the rotation amount detection means corresponding to the index body detection means detects the index body. Whether the one side in the left-right direction of the movable shelf precedes the other side in the moving direction of the movable shelf by comparing the rotational amount being detected with the rotational amount detected by the other rotational amount detection means Further, it may be configured to determine whether it is delayed, whether it is preceded or delayed.
According to this configuration, since the amount of rotation of the drive wheel is detected, control based on the amount of rotation of the wheel corresponding to the actual travel amount and good is not affected by slight unevenness of the floor surface. Can do.

In addition to the above configuration, the movable shelf equipment according to the present invention may be configured to detect the rotation amount of the axle of the drive wheel and detect the rotation amount of the axle of the drive wheel as the rotation amount of the drive wheel. Good.
According to this configuration, since the rotation amount of the axle that does not directly touch the floor surface is detected, the rotation amount of the driving wheel can be reliably detected without being influenced by the state of the floor surface.

In addition to the above-described configuration, the moving shelf control means according to the present invention confirms the detection state of each indicator body detecting means for each detection opportunity that occurs at a detection period of a predetermined time interval. , Based on the difference in the number of occurrences of detection opportunities between the detection opportunity when the index body detection means on one side in the left-right direction detects the index body and the detection opportunity when the other index body detection means detects the index body, It may be configured such that it is determined whether one side of the moving shelf in the left-right direction is ahead of, or behind, the other side in the moving direction of the moving shelf.
Alternatively, the moving shelf control means confirms the detection state by each index body detection means for each detection opportunity that occurs at a detection cycle of a predetermined time interval, and the index body detection means on one side in the left-right direction selects the index body. The difference in the number of occurrences of the detection opportunity between the detected detection opportunity and the detection opportunity at which the other-side index body detection means detects the index body, the detection cycle, and the rotational speed of each drive wheel in the drive pattern being executed Based on the rotation amount difference between the driving wheel on one side in the left-right direction and the driving wheel on the other side in the left-right direction, and based on the calculated rotation amount difference, You may comprise so that it may be judged whether it is ahead of the other side in the advancing direction of movement, it is late, and it is neither preceded nor delayed.
Even with this configuration, whether or not the inclination of the moving shelf has occurred can be determined while moving, and control according to the inclination of the moving shelf can be performed without waiting for the stop position to be reached. Is possible.

In addition to the above configuration, the moving shelf facility according to the present invention is such that the interval at which each indicator body is arranged in each indicator body row is 5% to 25% of the moving path direction dimension of the moving shelf. You may comprise.
According to this configuration, for example, the inclination and width deviation of the moving shelf are detected at every short interval of 15% of the moving path dimension (front / rear length) of the moving shelf (300 mm when the front / rear length of the moving shelf is 2 m). Therefore, even if a posture inclination or width deviation occurs, it can be detected before it becomes large and movement control can be performed accordingly.

Further, the moving shelf equipment according to the present invention is provided with the index path detecting means on one side and the other side in the front-rear direction along the moving path of the moving shelf with respect to the configuration of the index path detecting means and the determination of the posture inclination. The moving shelf control means determines whether the moving shelf orthogonal to the moving path is in the left-right direction based on the presence / absence of the detection state difference and the state of the difference between the indicator path detection means on one side and the other side in the front-rear direction. The direction of the inclination of the movable shelf relative to the movement path is determined by determining whether the side is ahead of or behind the other side in the traveling direction of the movement shelf. You may comprise so that it may judge.
Even with this configuration, whether or not the inclination of the moving shelf has occurred can be determined while moving, and control according to the inclination of the moving shelf can be performed without waiting for the stop position to be reached. Is possible.

In addition to the above configuration, the moving shelf facility according to the present invention includes a plurality of detection elements arranged in the left-right direction perpendicular to the moving path of the moving shelf. According to which detection element of the plurality of detection elements included in the path detection means detects the index path, the width shift direction of the movable shelf in the left-right direction orthogonal to the movement path is determined. May be.
According to this configuration, since it is possible to detect the width shift of the movable shelf while moving, the drive control according to the width shift direction is being moved without waiting for the movable shelf to reach the stop position. Can be performed.
Further, in addition to the above configuration, the moving shelf equipment according to the present invention may be configured such that the index path is made of a magnet and the index path detection means is made of a magnetic sensor.
According to this configuration, the possibility that the detection of the index body is hindered by the dirt on the floor surface is reduced.

In addition to the above configuration, the mobile shelf equipment according to the present invention is delayed when one side of the mobile shelf in the left-right direction is the right side and the other side is the left side, and the right side of the mobile shelf precedes the left side. If there is no advance or delay, the left-hand posture tilt, right-hand posture tilt, and no posture tilt, respectively. When there is a deviation, the width deviation direction is to the left, the width deviation direction is to the right, and the drive pattern that equalizes the rotational speed of each drive wheel is straight running, and the drive wheel provided on the right side of the moving shelf The driving pattern for making the rotational speed of the driving wheel provided on the left side of the movable shelf larger than the rotational speed of the driving wheel provided on the left side of the moving shelf is left turn, and the rotational speed of the driving wheel provided on the right side of the moving shelf is Less than the rotation speed of The drive pattern to be operated is a right turn, and the moving shelf control means has no width deviation and no attitude inclination, or when the width deviation direction is rightward and the attitude inclination is leftward, or the width deviation direction. When the angle is leftward and the posture inclination is rightward, the driving pattern of the straight running is executed, and when there is no width deviation and the posture inclination is leftward, or the width deviation direction is leftward and there is no posture inclination. If the width deviation direction is to the left and the posture inclination is to the left, the right turn drive pattern is executed, and if there is no width deviation and the posture inclination is to the right, or the width deviation The left turn driving pattern is executed when the direction is right and there is no posture tilt, or when the width shift direction is right and the posture tilt is right. It may be.
According to this configuration, it is not necessary to finely adjust the movement control of the moving shelf according to the degree of posture inclination and width deviation, and linear travel, right turn, left turn according to the direction of posture inclination and the direction of width deviation. Therefore, it is only necessary to be able to perform the three types of control, so that the configuration of the device for movement control can be simplified.

The moving shelf control method according to the present invention is a moving shelf control method for controlling movement of the moving shelf in the moving shelf control method that is movable along a predetermined movement path on the floor surface in the facility. Any one of the plurality of predetermined movement patterns is determined by driving the driving wheel used for moving the movement shelf by any one of the plurality of predetermined driving patterns. And the index path provided along the movement path is detected by the index path detection means provided on the movement shelf, and the movement shelf control means is based on the detection state of the index path by the index path detection means. The direction of the inclination of the movable shelf with respect to the movement path and the width shift direction of the movable shelf in the left-right direction orthogonal to the movement path are determined by the movement shelf control means, Kino direction and in accordance with the width deviation direction, one of a plurality of the drive to a predetermined pattern, and selects the drive pattern to be executed.
According to this configuration, it is only necessary to detect a rough state such as a posture inclination direction and a width deviation direction without strictly detecting the degree of posture inclination and width deviation, and the rotational speed of each driving wheel is finely controlled. There is no need to adjust, and it is only necessary to select one of several predetermined control patterns, so that the procedure for detection and control can be simplified.

In addition to the above configuration, the moving shelf control method according to the present invention has one of the left and right directions orthogonal to the moving path of the moving shelf as the left side and the other as the right side, and the type of driving pattern of the driving wheels of the moving shelf. The first drive pattern for linearly moving the movable shelf, the second drive pattern for pivoting the movable shelf to the right, and the third drive pattern for pivoting the movable shelf to the left are determined, and there is no width deviation and the posture inclination If there is none, the width deviation direction is rightward and the posture inclination is leftward, or the width deviation direction is leftward and the posture inclination is rightward, the first drive pattern is selected. When there is no width deviation and the posture inclination is leftward, or when the width deviation direction is leftward and there is no posture inclination, or when the width deviation direction is leftward and the posture inclination is leftward When the second driving pattern is selected and there is no width deviation and the posture inclination is rightward, or when the width deviation direction is rightward and no posture inclination, or the width deviation direction is rightward and The third drive pattern may be selected when the posture inclination is rightward.
According to this configuration, it is only necessary to detect a rough state such as rightward or leftward, rightward or leftward, without finely detecting the degree of posture inclination or width deviation. There is no need to adjust, and it is sufficient to perform only three types of control, that is, straight running, right turn, and left turn, so that the detection and control procedures can be simplified.

According to the present invention, it is not necessary to strictly detect the posture inclination or the degree of width deviation, and the configuration of the device for detection can be simplified, and the configuration of the device for movement control can be simplified. Construction of moving shelf equipment can be performed at a low cost.
In addition, since the posture inclination is detected while the moving shelf is moving, the control according to the posture inclination is promptly executed while moving without waiting for the moving shelf to reach the stop position. Can do. As a result, it is possible to suppress the occurrence of a width shift due to traveling while the movable shelf is inclined rightward or leftward.
Further, even if the floor surface has some irregularities or dirt, the amount of rotation of the axle of the drive wheel is not affected by such a floor surface failure. According to the present invention, the floor surface is in good condition. Even if it is not, appropriate control can be performed based on the correct rotation amount.

The perspective view which shows the movement shelf installation in an example of embodiment of this invention. The expanded side view which shows the lower frame body of the movement shelf in the movement shelf installation. It is a schematic plan view which shows the attitude | position inclination and width | variety deviation of a movement shelf, (a) is the state which has not raise | generated the attitude | position inclination and width | variety deviation, (b) is the state in which the attitude | position inclination is facing right, (c). Is a state in which the posture inclination is leftward, (d) is a state in which the width deviation is to the right, and (e) is a state in which the width deviation is to the left. The block diagram which shows the relationship between each structure in the movement shelf installation. Schematic which shows the type | mold of the shift | offset | difference of width | variety of a movement shelf and the attitude | position inclination in the movement shelf installation, and the type of drive pattern corresponding to them. The flowchart which shows the flow of the movement control of the movement shelf in the movement shelf installation.

In FIG. 1, the perspective view of the movement shelf installation as an example of embodiment of this invention is shown.
A plurality (three in this case) of moving shelves 11 are provided in the moving shelf facility 10, and fixed shelves 13 are arranged at both outer end positions of the moving path W of these moving shelves 11. Each movable shelf 11 travels between the fixed shelves 13 on the movement path W, so that the movable shelf 11 or the fixed shelf 13 is located between the movable shelves 11 or between the movable shelf 11 and the fixed shelf 13. A passage for carrying out the delivery work of the load T can be formed.
In the following, the direction along the movement path W is referred to as the front-rear direction, the direction orthogonal to the movement path W is referred to as the left-right direction, and one side of the movement shelf 11 movement direction on the movement path W is the front side and the other side. The front, rear and left and right are distinguished from each other as shown by the arrows in FIG.

[Fixed shelf]
As shown in FIG. 1, the fixed shelf 13 is composed of a shelf body 13a capable of storing a load T by combining a rod-like material and a plate-like material made of a load-bearing material such as steel, and this shelf body 13a. The lower end of the column 13b extending in the vertical direction of the bar-shaped material constituting the is fixed to the floor surface of the movable shelf facility 10 by bolting or the like. Although not shown in FIG. 1, a light reflecting plate is attached near the lower end of the support column 13b at the outermost ends (left end and right end) in the left-right direction so that light from a photo reflector described later can be reflected. It has become.

[Moving shelf]
The movable shelf 11 includes a shelf body 11a that can store the load T and the lower frame body 12 that supports the shelf body 11a at the lower part, similarly to the shelf body 13a of the fixed shelf 13. The lower frame body 12 has a rectangular frame shape that combines frame materials made of load-bearing materials, and is wide in the left-right direction (for example, about 15 m) according to the size of the shelf body 11a. (For example, about 2 m).
A stop position detector 17 including a photoelectric sensor such as a photo reflector and a light reflecting plate is attached to the lower left and right ends of the lower frame 12. When the photoelectric sensor of the stop position detector 17 is a photoreflector, the fixed shelf 13 or others depending on whether or not the light projected in the front-rear direction is reflected back by the light reflecting plate. It is possible to detect whether or not the vehicle is approaching the movable shelf 11, that is, whether or not it has reached a position to be stopped. The stop position detectors 17 are provided on both front and rear sides of the movable shelf 11.
As a means for actually moving the movable shelf 11, a plurality of pairs of front and rear wheels are provided in the left-right direction below the lower frame body 12 (a position not visible in FIG. 1). For example, such a wheel pair is provided near the base of a column 11b (vertical bar-like material) that serves as a left and right partition of the storage compartment for the load T in the moving shelf 11 so that the weight of the entire moving shelf 11 can be dispersed and supported. Well, as illustrated in FIG. 1, when the storage compartment is three layers in the upper and lower sides, two steps in the front and rear, and four rows on the left and right per moving shelf 11, the wheel pair is divided into four columns in the left and right direction. Five pairs are provided corresponding to 11b.

[Wheel]
In the enlarged side view of the lower frame body 12 shown in FIG. 2, a pair of the outermost ends (here, the right ends) of the wheel pairs in the left-right direction is shown. Of these outermost wheel pairs, one (rear here) is the driving wheel 14R and the other (front here) is the driven wheel 15R.
In the following, regarding the components provided on both the left and right sides such as the drive wheels 14R, the right side component and the left side component are distinguished from each other, so that the reference numeral indicating the right component is “R”, “L” is attached to a symbol representing an element. That is, like the right driving wheel 14R and the driven wheel 15R, the left driving wheel 14L and the driven wheel 15L are provided on the left side of the movable shelf 11 although not shown in FIG. In addition, in the following description, the same elements are provided on the left side of the components to which “R” is attached.
A driving wheel 14R shown in FIG. 2 is given a rotational driving force by a driving motor 18R (supported by the lower frame body 12) as a driving source via a driving axle 16R supported on the lower frame body 12. It is like that. The drive racks 14R on both sides of the outermost end (left and right sides) are rotated by the drive motor 18R while being in contact with the floor surface, whereby the movable shelf 11 can move in the front-rear direction on the floor surface. . A rotation amount detection device 20R (20L) as a rotation amount detection unit is attached to each of the drive axles 16R (16L) of the left and right drive wheels 14R (14L).
On the other hand, the driven wheel 15R is pivotally supported by the lower frame body 12 via a driven axle 19R, and is driven by friction with the floor surface when the movable shelf 11 is moved by rotating the driving wheel 14R. It is designed to rotate.
Although not shown here, the inward wheel pair (not the left end or the right end) is composed of driven wheels both in the front and rear.

[Rotation amount detector]
A rotation amount detection device 20R serving as a rotation amount detection unit attached to the drive axle 16R of the drive wheel 14R includes a rotation amount detection plate 24R having a gear-like outline and a photoelectric sensor 26R such as a photo interrupter, and detects the rotation amount. The plate 24R is fixed coaxially with the drive axle 16R so as to rotate with the drive axle 16R, and the photoelectric sensor 26R is attached via a bracket 22R extending from the lower frame body 12 so that the rotation of the rotation amount detection plate 24R can be detected. ing.
The rotation amount detection device 20R detects the rotation amount of the rotation amount detection plate 24R, that is, the rotation number (how many rotations) and the rotation angle (how many rotations have been performed in terms of angles). For example, when the photoelectric sensor 26R is a photo interrupter, it is configured to project light on the gear-shaped irregularities on the outer periphery of the rotation amount detection plate 24R and detect whether or not the light is blocked, and start detection. By counting the number of times the light is blocked from the rotation amount of the rotation amount detection plate 24R based on the pitch of the gear-shaped uneven portions (the angular widths of the concave portions and the convex portions), and hence the rotation of the drive axle 16R and the drive wheels 14R. The amount can be detected.

[Magnetic sensor and magnet]
As shown in FIGS. 2 and 3, an index road detecting means is configured near the center in the front-rear direction of the lower frame body 12 so as to correspond to the left and right drive wheels 14L and 14R and the respective rotation amount detection devices 20L and 20R. Magnetic sensors 30L and 30R as index body detection means are provided. The magnetic sensors 30L and 30R can detect the presence and strength of magnetism near the floor surface using a Hall element or the like.
As shown in the blowout in FIG. 2, the magnetic sensor 30 </ b> R is configured by arranging a plurality (here, eight) of detection elements 31. The alignment direction of the detection elements 31 is the left-right direction. It arrange | positions so that it may correspond, ie, orthogonal to the moving direction of the movement shelf 11. FIG. The magnetic sensor 30R can transmit a signal indicating which detection element 31 of the plurality of detection elements 31 has detected magnetism. For example, when the central position of the array of the detection elements 31 is set as the reference position of the magnetic sensor 30R, the position where the magnetism exists is determined as the reference position of the magnetic sensor 30R depending on which detection element 31 detects the magnetism. It can be detected whether they match or are shifted to the left and right.
The left and right direction positions of the magnetic sensors 30L and 30R are slightly inward of the left and right drive wheels 14L and 14R as shown in FIG. 3A, but both correspond to the left and right drive wheels 14L and 14R, respectively. It is provided as a thing. In addition, the magnetic sensor 30L on the left and right side (for example, the left side) and the magnetic sensor 30R on the other side (for example, the right side) are arranged so that the position in the front-rear direction on the movable shelf 11 is the same.
On the other hand, as shown in FIG. 3, a fixed interval (5% to 25% of the front-rear dimension of the movable shelf 11, for example, a shelf, is provided on the floor surface of the movable shelf facility 10 along the movement path W of the movable shelf 11. When the front-rear dimension is 2 m, a magnet 32 as an index body is embedded every 15% (300 mm).
The magnet rows 34L and 34R (index body rows) as index paths formed by the magnets 32 are arranged in two rows in the left-right direction corresponding to the magnetic sensors 30L and 30R provided on the left and right sides of the movable shelf 11, respectively. (The left magnet row 34L and the right magnet row 34R) are provided, and with respect to the left and right positions thereof, the moving shelf 11 does not move left and right on the moving path W (that is, without causing a posture inclination and a width deviation, When the magnet 32 is arranged at a position through which a reference position (for example, the center) set in the magnetic sensors 30L and 30R passes when it moves (as intended by the operator of the mobile shelf facility 10), the magnet The rows 34L and 34R extend along the movement path W. And the position of each magnet 32 in the front-rear direction is matched in both the left and right magnet rows 34L and 34R, as shown in FIG. That is, the magnet 32 in the magnet row 34R on the other side (for example, the right side) is disposed at the same longitudinal position as the magnet 32 in the magnet row 34L on the left and right side (for example, the left side).

[Moving shelf controller]
As shown in the block diagram of FIG. 4, the moving shelf facility 10 is provided with a moving shelf controller 50 as moving shelf control means for controlling the movement of the moving shelf 11. The moving shelf controller 50 may be configured as a processor directly attached to the moving shelf 11, but here, the moving shelf controller 50 is prepared at a position away from the moving shelf 11, and each device ( (Stop position detector 17, drive motors 18L and 18R, rotation amount detection devices 20L and 20R, magnetic sensors 30L and 30R, etc.) will be described as being configured as a computer that communicates wirelessly or by wire.
The moving shelf controller 50 controls the movement of the moving shelf 11 based on signals from various detectors that detect the state of the moving shelf 11. That is, here, the presence or absence of approach to another shelf detected by the stop position detector 17, the rotation amounts of the drive wheels 14L and 14R detected by the rotation amount detection devices 20L and 20R, and the magnet 32 by the magnetic sensors 30L and 30R. The rotation of the drive motors 18L and 18R is controlled based on the presence or absence of detection (detection state).
The moving shelf controller 50 is a command device 60 (an operation panel directly attached to the moving shelf 11 or the moving shelf 11) that transmits an operation command from an operator in the moving shelf facility 10 or a user in a remote place. When a command is received from the command device 60 to move the movable shelf 11, the movement of the movable shelf 11 is started.

[Move control]
<Stopped state>
Hereinafter, of the three movable shelves 11 shown in FIG. 1, the one in the center in the front-rear direction, that is, the movement control of the movable shelf 11 that starts moving from the state where the passage is open in the front and the other movable shelf 11 is in the rear. A description will be given with reference to FIGS.
In the movable shelf 11 at the center in the front-rear direction in FIG. 1, the stop position detector 17 on the front side among the stop position detectors 17 provided at the lower front, rear, left and right ends has no other shelf in the front. The stop position detector 17 on the rear side detects that there is another moving shelf 11 in the rear. At this time, the moving shelf controller 50 that receives a signal from the stop position detector 17 is in a stopped state with respect to the state of the moving shelf 11, and the axle rotation amount of the drive wheels 14L and 14R is zero on both the left and right sides. Therefore, it is determined that neither the posture inclination nor the width deviation occurs.

<Running start>
When a command is issued from the commanding device 60 to move (move forward or backward) one of the movable shelves 11, the movable shelf controller 50 first determines whether there is already another shelf in the direction of travel according to the command. Judge whether. That is, regarding the moving shelf 11 that is instructed to move, whether the other shelf is present forward is provided in the moving shelf 11 that is instructed to move if the instruction is forward, or backward if the instruction is backward. A determination is made based on the signal from the stop position detector 17 that has been received, and if there is another shelf in the direction of travel, a signal notifying that travel is impossible is returned to the command device 60.
If there is no other shelf in the traveling direction (the passage is open) and the traveling is possible, the drive motors 18L and 18R for the left and right drive wheels 14L and 14R of the movable shelf 11 correspond to the traveling direction, respectively. By driving in the rotational direction, the movement in the front-rear direction along the movement path W, that is, the forward or backward movement of the movable shelf 11 is started (step S1 in FIG. 6). At the start of travel, the left and right drive wheels 14L and 14R may be driven to rotate in a “linear travel” drive pattern described later.

<Detection by magnetic sensor and rotation amount detection device>
While the movable shelf 11 is moving forward or backward, the movable shelf controller 50 detects each of the rotation amount detection devices 20L and 20R provided corresponding to the drive wheels 14L and 14R of the movable shelf 11, respectively. The rotation amount of the axles of the drive wheels 14L and 14R and the signals indicating the detection states of magnetism by the magnetic sensors 30L and 30R corresponding to the drive wheels 14L and 14R and the rotation amount detection devices 20L and 20R are received.
The moving shelf controller 50 does not change the control state of the drive motors 18L and 18R until the magnet 32 (magnetism thereof) arranged on the floor of the facility is detected by the magnetic sensors 30L and 30R (in FIG. 6). Step S2).
Then, when the magnet 32 is detected by any one of the magnetic sensors 30L and 30R, the posture inclination and the width deviation state of the movable shelf 11 are determined by the following procedure (step S3 in FIG. 6).

<< Attitude Judgment >>
When the moving end 11 moves in the front-rear direction in the movement path W (forward or backward), as shown in FIG. 3, the left and right magnetic sensors 30L, 30R move above the left and right magnet rows 34L, 34R, respectively. Passing through and detecting the magnets 32 (the magnetism generated) in each of the magnet arrays 34L, 34R.
Here, for example, when the magnetic sensor 30R corresponding to the right drive wheel 14R transmits a signal indicating that the magnet 32 in the right magnet row 34R is detected to the moving shelf controller 50, the moving shelf controller 50 Check the amount of rotation of the axles of the drive wheels 14L and 14R detected by the rotation amount detection devices 20L and 20R on the left and right sides at the time, that is, how much rotation has occurred from the start of movement to this time, and rotate both Compare quantities.
As a result of comparing the rotation amounts of the axles of the left and right drive wheels 14L and 14R, if there is a difference in the rotation amount (rotation amount difference) between them, the moving shelf controller 50 will move the moving shelf 11 with respect to the moving path W. It is determined that the posture is tilted in the left-right direction, that is, the posture tilt is generated.
Specifically, for example, if the amount of rotation of the axle of the right drive wheel 14R (drive axle 16R) is smaller than the amount of axle rotation of the left drive wheel 14L, the right side of the movable shelf 11 is delayed behind the left side. (Delayed), that is, it is determined that a rightward posture inclination occurs (state shown in FIG. 3B). Conversely, if the amount of rotation of the right drive axle 16R is larger than the amount of axle rotation of the left drive wheel 14L, the right side of the movable shelf 11 has advanced forward (preceded) than the left side, that is, a leftward attitude. It is determined that an inclination has occurred (state shown in FIG. 3C). If there is no rotation amount difference, it is determined that there is no delay or advance, and no posture inclination has occurred (the state in FIG. 3A).
However, even if there is a rotation amount difference, if the rotation amount difference is very small and does not exceed an allowable value (for example, 1 °) determined in advance by the operator or the designer of the moving shelf facility 10, there will be delay or advance. However, the movable shelf controller 50 may determine that no posture inclination occurs.
This determination may be made according to the sign of the difference between the axle rotation amounts of the drive wheels 14L and 14R. For example, when the axle rotation amount of the right drive wheel 14R is NR and the axle rotation amount of the left drive wheel 14L is NL, the value of “NR−NL” is zero (or a very small value) Depending on whether it is a value or a negative value, it may be determined that there is no posture inclination, left direction, or right direction, respectively.
In the above description, the case where the right magnetic sensor 30R detects the magnet 32 has been described, but the same determination is made even when the left magnetic sensor 30L detects the magnet 32.

<< Judgment of width misalignment direction >>
When the magnet 32 is detected by the magnetic sensors 30R and 30L, it is also detected whether the movable shelf 11 has a width shift in the left-right direction and whether the width shift direction is in the left-right direction. Make (judgment). Here, the detection of the width shift using the right magnetic sensor 30R will be described, but the same detection can be performed using the left magnetic sensor 30L.
The determination of the width shift direction of the movable shelf 11 is made based on which of the plurality of detection elements 31 included in the magnetic sensor 30R has detected the magnet 32 (magnetism thereof). Specifically, for example, each of the detection elements 31 arranged in a plurality in the left-right direction (eight in this case) in the magnetic sensor 30R is No. 1 to No. 1 in order from the left in the drawing. The magnetic sensor 30R sends a signal indicating which No. detection element 31 has detected the magnet 32 to the moving shelf controller 50 as a detection state (FIG. 4).
Here, for example, as shown in the balloon in FIG. 4 and no. If the detection element 31 of 5 is detecting the magnet 32 (ON), the reference position (center) of the magnetic sensor 30R and the position where the magnetism exists (detection position of the magnet 32) match. Therefore, it is determined that there is no lateral shift in the movable shelf 11.
For example, as shown in FIG. 2 and no. If the three detection elements 31 detect the magnet 32, the entire moving shelf 11 is shifted to the right side in the left-right direction with respect to the movement path W, so that the detection position of the magnet 32 is shifted to the left side. That is, it is determined that the movable shelf 11 has a right-side width shift (the width-shift direction is right).
Further, for example, as shown in FIG. 6 and no. 7 is in a state where the detection element 31 is detecting the magnet 32, the detection position of the magnet 32 is shifted to the right side because the entire moving shelf 11 is shifted to the left side in the left-right direction with respect to the movement path W. That is, it is determined that the movable shelf 11 is shifted to the left (the width shift direction is to the left).
As described above, regarding the detection state by the magnetic sensor 30R, when the magnet 32 is detected at the reference position (center) among the plurality of detection elements 31 arranged in the left-right direction provided in the magnetic sensor 30R, the width shift is caused. If the detection element 31 on the left side of the reference position detects the magnet 32, the width shift direction is determined to be rightward. If the detection element 31 on the right side of the reference position detects the magnet 32, the width shift is determined. Judge that the direction is to the left.
In the above description, the case where the left and right positions of the magnet 32 are between the detection elements 31 and the two detection elements 31 detect the magnet 32 has been described. However, the magnet 32 is positioned directly below one of the detection elements 31. In some cases, only one detection element 31 may detect the magnet 32. Even in that case, the width shift direction may be determined based on whether the detection element 31 that detects the magnet 32 is on the left or right side. For example, no. 4 and no. No. 5 is used as the reference position. If only the four detection elements 31 detect the magnet 32, it means that the detection element 31 located to the left of the reference position has detected the magnet 32, and therefore the width shift direction is determined to be rightward. Alternatively, no. 4 or No. For minute width deviations such as when only 5 is ON, it is within the allowable range (no width deviation). 1-No. No. 3 is turned to the right when No. 3 is ON. 6-No. When any one of 8 is turned on, it may be determined to be leftward.

<Select driving pattern for straight running or left / right turn>
When the posture inclination direction and the width deviation direction of the movable shelf 11 are determined in the manner as described above, the combination of the posture inclination direction and the width deviation direction is classified into any of the nine patterns shown in FIG. As for the movement control of the movable shelf 11, it is decided to perform the control for driving the drive wheels 14L and 14R by the type of drive pattern determined corresponding to each pattern as described below (in FIG. 6). Step S4). When such determination (selection) is performed by software, the type of driving pattern is determined by comparing the variable indicating the posture inclination state and the variable indicating the width deviation state with a previously prepared variable table. It is recommended that the variables shown be obtained.

<< About drive pattern types >>
In the following, the drive patterns of the drive wheels 14L and 14R in each situation are “linear running” as the first drive pattern, “right turn” as the second drive pattern, and “right turn” as the third drive pattern. Which of the “left turn” will be described.
Here, “straight running” is a drive pattern for controlling the rotational speed of each drive wheel to be equal (by the drive control of the left and right drive motors 18L and 18R), that is, the rotational speed of the right drive wheel 14R. Is the same as the rotation speed of the left drive wheel 14L. When this linear driving pattern is executed, the movable shelf 11 is moved in a linear movement pattern.
“Right turn” is a drive pattern for controlling the rotational speed of the right drive wheel 14R to be smaller than the rotational speed of the left drive wheel 14L (or to make the left rotational speed larger than the right side). It is. When this right turn driving pattern is executed, the movable shelf 11 is moved in a movement pattern that turns rightward.
The “left turn” is a drive pattern for controlling the rotation speed of the right drive wheel 14R to be larger than the rotation speed of the left drive wheel 14R (or making the right rotation speed smaller than the left rotation). . When the left turn driving pattern is executed, the movable shelf 11 is moved in a movement pattern that turns leftward.
These drive patterns can be set by determining how fast the drive wheels 14L and 14R are rotated. That is, the rotational speed setting value of the left driving wheel 14L and the rotational speed setting value of the right driving wheel 14R are determined in advance for each driving pattern, and when one of the driving patterns is executed, the driving pattern is determined. The left and right drive wheels 14L and 14R may be rotated at the set rotational speed.

<< Correspondence relationship between the type of posture inclination direction and width deviation direction and drive pattern type >>
The type of drive pattern to be executed is selected as follows in accordance with the posture inclination direction and width shift direction of the movable shelf 11.
As shown in FIG. 5A, when there is no width shift and there is no posture inclination, a driving pattern for linear travel is selected.
As shown in FIG. 5B, when there is no width deviation and the posture inclination is rightward, the left turn drive pattern is selected.
As shown in FIG. 5C, when there is no width shift and the posture inclination is leftward, a right turn drive pattern is selected.
As shown in FIG. 5D, when the width deviation direction is rightward and there is no posture inclination, the left turn drive pattern is selected.
As shown in FIG. 5E, when the width shift direction is rightward and the posture inclination is rightward, the left turn drive pattern is selected.
As shown in FIG. 5F, when the width misalignment direction is rightward and the posture inclination is leftward, a linear travel drive pattern is selected.
As shown in FIG. 5G, when the width misalignment direction is leftward and there is no posture inclination, a right turn drive pattern is selected.
As shown in FIG. 5H, when the width shift direction is leftward and the posture inclination is rightward, a driving pattern for linear travel is selected.
As shown in FIG. 5I, when the width misalignment direction is leftward and the posture inclination is leftward, a right turn drive pattern is selected.
When it is determined which type of control is to be performed as described above, the selected control, that is, straight running, left turn, or right turn is executed (step S5 in FIG. 6).

<Continuation of movement and stop control>
When the moving shelf controller 50 executes a drive pattern of straight running, left turn, or right turn (updates the rotational speed setting values of the drive wheels 14L, 14R by the drive motors 18L, 18R in FIG. 2), It is confirmed whether or not the stop position detector 17 has detected the presence of another shelf in the traveling direction (step S6 in FIG. 6).
If there is no detection by the stop position detector 17, that is, if it has not yet approached another shelf and has not reached the position to be stopped, the movement of the moving shelf 11 is continued, and from step S2 in FIG. Step S5 is repeated. That is, until the next magnet 32 present in the traveling direction is detected by the magnetic sensors 30L, 30R, the linear driving, left turn, or right turn drive pattern executed in step S5 is continued, and the magnetic sensors 30L, 30L, When 30R detects the next magnet 32, the posture inclination and the width deviation of the movable shelf 11 at that time are determined again, and based on the type of the posture inclination and the width deviation at that time, the next is straight running, left turn, Select and execute which drive pattern of right turn is executed.
By repeating this, every time the position of the magnet 32 is passed, the moving state of the moving shelf 11 is adjusted, and even if there is a posture inclination or a width shift, they are corrected.
As to which type of drive pattern is executed according to each state shown in FIGS. 5A to 5I, the state of posture inclination and width shift changes as a result of movement in the movement pattern associated with the drive pattern. Thus, a state where there is no posture inclination and no width deviation, that is, a state shown in FIG. 5A is finally reached.
When the stop position detector 17 detects the presence of another shelf in the traveling direction, it is determined that the movable shelf 11 has reached the position where it should be stopped, and the drive of the drive motors 18L and 18R is stopped, thereby moving the movable shelf 11. Is stopped (step S7 in FIG. 6). It should be noted that the rotation amount detection values of the drive wheels 14L and 14R detected by the rotation amount detection devices 20L and 20R at the time of the stop may be reset to zero, but this reset is performed by the magnetic sensors 30L and 30R detecting the magnet 32. You may make it perform each time (after judging posture inclination and width gap).

  In the movable shelf equipment 10 having the movable shelf 11 controlled as described above, the posture inclination and width of the movable shelf 11 each time the magnetic sensors 30L and 30R pass over the magnets 32 provided at regular intervals on the floor surface. Since the deviation is judged and how it should move is controlled according to the posture inclination and the state of the width deviation, the posture inclination while moving without waiting for reaching the stop position And width deviation can be corrected. Further, if the arrangement interval of the magnets 32 is a short distance (for example, 300 mm), this correction is frequently performed. Therefore, the period during which the posture inclination is generated is shortened. It can be prevented before it occurs or it will be negligible.

  Further, since the rotation amount of the axle that does not directly contact the floor surface is detected as the rotation amount of the drive wheels 14L and 14R, the actual rotation is not affected by slight unevenness or dirt on the floor surface. Control can be performed based on the quantity.

  Further, the drive pattern of the drive wheels 14L and 14R is determined depending on whether the posture inclination is in the left-right direction or the width deviation is in the left-right direction (select one of straight running, right turn, and left turn). Therefore, it is qualitative and rough whether it is rightward or leftward without detecting the degree of posture inclination and width deviation quantitatively (without detecting how many degrees the angle is inclined or how many mm deviation). It is not necessary to precisely control the rotation speed, and it is only necessary to select one of a plurality of predetermined patterns, so that the configuration of the device for detection and control can be configured. Easy and low cost.

  Further, as the entire moving shelf facility 10, it is necessary to control the movement of a plurality of moving shelves 11 (three in FIG. 1). Therefore, it is only necessary to perform a simple control of selecting a drive pattern as determined in accordance with the movement shelf controller 50 for each of the movement shelves 11 (such as calculating an optimum travel locus). There is no need to prepare, and it is possible to control a plurality of movable shelves 11 with one movable shelf controller 50.

  Further, in the control method according to the present embodiment, the rotational speeds of the drive wheels 14L and 14R are not finely adjusted according to the degree of posture inclination or the degree of width deviation, but simply according to the posture inclination direction and the width deviation direction. The direction of turning is determined, and when the posture inclination direction and the width deviation direction change, the turning direction is changed again. If so, there are few elements whose control content should be changed depending on factors (environmental conditions) specific to the moving shelf facility 10 such as the size of the moving shelf 11 itself and the length of the moving path W in the front-rear direction. The control contents used in the above can be diverted with almost no change in other mobile shelf equipment.

In the above embodiment, the magnet 32 and the magnetic sensors 30L and 30R are used as the index body and the index body detection means. Instead, a light reflecting plate is installed on the floor surface, and the lower part of the movable shelf 11 Alternatively, an optical detection method may be adopted in which a photo reflector is provided.
In this way, detection can be performed without delay even in an environment where magnetic detection is difficult, such as when the floor surface is a metal plate. On the other hand, when the magnet 32 and the magnetic sensors 30L and 30R are used, there is an advantage that the detection is not hindered even if there is some optical contamination on the floor surface. Further, even when a metal piece and a metal detection sensor are used, there are similar advantages.

  In the above-described embodiment, the rotation amount of the drive axle 16R is detected using the rotation amount detection plate 24R that rotates together with the drive axle 16R. However, an encoder is directly attached to the drive axle 16R, or the drive wheels 14R The rotation amount may be detected by using a configuration other than the rotation amount detection plate 24R, such as detecting and reflecting the reflection plate with a photo reflector in a circumferential direction.

Further, in the above embodiment, the determination of which of the right side and the left side of the movable shelf 11 is ahead / slow is performed by comparing the rotation amounts of the drive wheels 14R and 14L. In the case where the detection state by the magnetic sensors 30L and 30R is to be confirmed every time the detection timing (detection opportunity) 50 occurs at a fixed detection cycle (for example, every 20 millisecond time interval), the detection timing The determination may be made using the number of occurrences. For example, the magnetic sensor 30R on the right side detects the magnet 32 at a certain detection timing, while the magnetic sensor 30L on the left side does not detect the magnet 32, and the magnetic sensor 30L on the left side detects at the next detection timing. If the magnet 32 is detected, it means that there is a difference in the number of occurrences between the detection timings when the left and right magnetic sensors 30L, 30R detect the magnet 32, and the right side is leading (leftward facing). Posture inclination). Further, if the left and right magnetic sensors 30L and 30R both detect magnets at a certain detection timing, that is, if there is no difference in the number of detection timing generations on the left and right, it is determined that there is no preceding / delay (no posture inclination).
Further, the rotation amount is not detected by the rotation amount detection devices 20L and 20R, but is calculated from the set value of the rotation speed at which the drive wheels 14L and 14R are driven, and the difference between the rotation amounts of the left and right drive wheels 14L and 14R. May be requested. For example, when the detection timing as described above is set, if there is a difference in the number of detection timing occurrences N times from detection by the right magnetic sensor 30R to detection by the left magnetic sensor 30L, the right drive The rotation amount of the wheel 14R is larger than the rotation amount of the left drive wheel 14L by a value of [(rotation speed) × (detection cycle) × N] (the right side is ahead and the posture inclination is facing left). It will be. In the case of “straight running”, the value of [(rotation speed) × (detection cycle) × N] is the difference in rotation amount as it is, but in the case of “left turn” and “right turn”, (rotation speed) It is better to calculate using (the difference in rotational speed between left and right) instead of
Further, in the above embodiment, the determination of which of the right side and the left side of the moving shelf 11 is leading / slowing is performed by comparing the rotation amounts of the drive wheels 14R and 14L. A timer (time measuring means) capable of measuring the elapsed time or the elapsed time from a specific designated time such as the elapsed time from the time when one of the magnetic sensors 30L and 30R detects the magnet 32 is provided on the movable shelf 11. Whether the right side or the left side of the moving shelf 11 is leading / lagging based on the time difference (which detection was earlier / slower) when each of the magnetic sensors 30L, 30R detected the magnet 32, and therefore You may make it judge what the direction of the attitude | position inclination of the movement shelf 11 is. It should be noted that the elapsed time measured by the timer may be reset to zero when the moving shelf is stopped. This resetting is performed every time the magnetic sensors 30L and 30R detect the magnet 32 (by determining the posture inclination and the width deviation). From).

  In the above-described embodiment, the width deviation can be detected regardless of which of the magnetic sensors 30L and 30R detects the magnet 32. However, the width deviation is detected only on one of the left and right sides, for example, on the right side. It may be performed only when the magnetic sensor 30R detects the magnet 32. For the left side (the other side) magnetic sensor 30L, the movable shelf controller 50 no matter which of the plurality of detection elements 31 is turned on. Only the presence / absence of detection is transmitted to the No. of detection element 31. May not be transmitted. Alternatively, the left magnetic sensor 30L may be configured as a sensor having only a single wide detection element.

  Further, in the above-described embodiment, the width shift is detected depending on which of the plurality of detection elements 31 arranged in the left-right direction detects the magnet 32 and is turned ON. A device capable of detecting the strength and the direction of the lines of magnetic force may be used, and the width shift may be detected based on the detection state of what kind of magnetism has been detected.

  In the above embodiment, the drive wheels 14L and 14R, the magnet rows 34L and 34R, the magnetic sensors 30L and 30R are provided on the left and right sides, that is, two each. However, when the size of the movable shelf 11 is large Etc. may increase these numbers. Even in that case, for example, it is possible to examine the orientation of the posture inclination depending on whether the axle rotation amount of the drive wheel on the right side is larger or smaller than the axle rotation amount of the drive wheel on the left side, and also about the movement control, For example, straight running, right turn, and left turn can be executed depending on whether the rotational speed of the drive wheel on the right side is made larger or smaller than the rotational speed of the drive wheel on the left side.

In the embodiment described above, the magnet rows 34L and 34R in which the magnets 32 are arranged at regular intervals are used as index paths. However, a magnet tape (or a long magnet plate) extending along the movement path W is used as the magnet. It is good also as an index road which consists of. In this case, a magnetic sensor having a structure in which a plurality of detection elements 31 are arranged in the left-right direction is aligned in the left-right direction on the front side (one side in the front-rear direction) and the rear side (the other side) of the movable shelf 11. It is attached and the No. of the detecting element 31 that detects the magnetic tape in the magnetic sensor on the front side. No. of the detecting element 31 detecting the magnetic tape in the detecting element on the rear side. It is preferable to check the orientation of the posture inclination based on whether or not there is a difference (whether there is a difference in detection state) and how it is different (difference state) (for example, No. 6 on the front side). If it is ON and No. 3 is ON on the rear side, it can be determined that it is facing left). In addition, in the width shift direction, the movable shelf 11 is shifted to the left or right as a whole depending on whether the average value of the detection elements No. which are both ON in the front and rear is larger or smaller than a reference value (for example, 4.5). (For example, if No. 1 is ON on the front side and No. 4 is ON on the rear side, the average value is as small as 2.5, and the posture inclination is pointing to the right. And the width shift direction can be judged to be to the right). In such a configuration, only one magnetic tape may be used as the index path, but a plurality of magnetic tapes may be provided to increase the detection accuracy of the posture inclination and the width deviation, or the magnet row 34L. , 34R and a magnetic tape may be used in combination. The method of attaching the magnetic sensors to the front side and the rear side of the movable shelf 11 can also be used when the index path is composed of one magnet row, in which case the front magnetic sensor and the rear magnetism are used. It is preferable to set the distance between the sensors in the front-rear direction to be an integer multiple of the magnet arrangement interval in the magnet array because the timings when the front and rear magnetic sensors pass over the magnets coincide.
In the above embodiment, the magnetic sensors 30L and 30R are attached near the center in the front-rear direction below the movable shelf 11 as shown in FIG. 2, and in the left-right direction as the position on the inner side as shown in FIG. However, the position where the magnetic sensors 30L and 30R are arranged is not limited to this, and may be attached to the side of the movable shelf 11, for example. In this case, the magnet rows 34L and 34R may be provided along the movement path W on the left and right sides of the movement path W of the moving shelf 11 so that the magnetic sensors 30L and 30R can detect the side. Further, the arrangement position of the stop position detector 17 is not limited to the lower left and right ends of the movable shelf 11 and may be attached to another position.

DESCRIPTION OF SYMBOLS 10 Moving shelf equipment 11 Moving shelf 14L, 14R Drive wheel 18L, 18R Drive motor 20L, 20R Rotation amount detection apparatus 30L, 30R Magnetic sensor 32 Magnet 34L, 34R Magnet row 50 Moving shelf controller W Moving path

Claims (13)

In a moving shelf facility having a movable shelf movable on the bottom surface in the facility,
The moving shelf equipment is provided with moving shelf control means for controlling the movement of the moving shelf, and an indicator path extending along the moving path of the moving shelf,
The movable shelf includes a shelf body capable of storing a load, a plurality of drive wheels for moving the movable shelf along a predetermined movement path, and an index path capable of detecting the index path. Detection means,
The moving shelf control means includes
Which of the plurality of predetermined movement patterns is determined by driving each of the driving wheels with one of a plurality of predetermined driving patterns to control the rotational speed of each driving wheel. Can be moved in,
Based on the detection state of the index path by the index path detection means, determine the orientation inclination direction of the moving shelf with respect to the movement path and the width shift direction of the movement shelf in the left-right direction orthogonal to the movement path,
One moving pattern to be executed is selected from among a plurality of predetermined driving patterns according to the orientation of the posture and the width deviation direction. The indicator path is composed of at least two indicator body rows arranged on the floor surface in the mobile shelf facility at regular intervals along the movement route of the mobile shelf,
The indicator path detection means comprises at least two indicator body detection means corresponding to the indicator body rows provided on one side and the other side in the left-right direction orthogonal to the movement path,
Based on the detection state of the index body by each of the index body detection means while the mobile shelf is moving, the moving shelf control means is a moving direction of the moving shelf based on one side in the left-right direction of the moving shelf The direction of the posture inclination of the moving shelf with respect to the moving path is determined by determining whether the head is ahead of the other side, is delayed, or is not ahead or delayed. The moving shelf equipment according to 1. The moving shelf includes at least two rotation amount detection means for detecting at least two rotation amounts of the plurality of drive wheels, respectively, corresponding to each indicator body detection means,
When any one of the index body detection means detects the index body while the movable shelf is moving, the rotation amount detected by the rotation amount detection means corresponding to the index body detection means and other rotations According to the comparison with the rotation amount detected by the amount detection means, whether one side of the moving shelf in the left-right direction is ahead of, or behind, the other side in the moving direction of movement of the moving shelf. The mobile shelf equipment according to claim 2, wherein it is determined whether it is not.   4. The moving shelf equipment according to claim 3, wherein the rotation amount detecting means detects the rotation amount of the axle of the drive wheel, and detects the rotation amount of the axle of the drive wheel as the rotation amount of the drive wheel. The moving shelf control means confirms the detection state by each index body detection means for each detection opportunity that occurs at a detection cycle of a predetermined time interval,
Based on the difference in the number of occurrences of detection opportunities between the detection opportunity when the index body detection means on one side in the left-right direction detects the index body and the detection opportunity when the other index body detection means detects the index body, the movement 3. The method according to claim 2, wherein it is determined whether one side of the shelf in the left-right direction is ahead of, or behind, the other side in the moving direction of the moving shelf. Moving shelf equipment. The moving shelf control means confirms the detection state by each index body detection means for each detection opportunity that occurs at a detection cycle of a predetermined time interval,
The difference in the number of occurrences of detection opportunities between the detection opportunity when the index body detection means on one side in the left-right direction detects the index body and the detection opportunity when the other index body detection means detects the index body, and the detection cycle Based on the rotational speed difference of each driving wheel in the drive pattern being executed, the rotational amount difference between the one side driving wheel and the other side driving wheel in the left-right direction is obtained, and based on the obtained rotational amount difference It is determined whether one side of the moving shelf in the left-right direction is ahead of the other side in the traveling direction of the moving shelf, is delayed, or is neither advanced nor delayed. 2. The moving shelf equipment according to 2.   The interval between the indicator bodies in each indicator body row is 5% to 25% of the dimension in the moving path direction of the moving shelf, according to any one of claims 2 to 6. The listed moving shelf equipment. At least two index path detection means are provided on one side and the other side in the front-rear direction along the moving path of the moving shelf,
Based on the presence / absence of the detection state difference and the state of the difference by each of the index path detection means, the moving shelf control means is configured such that one side of the moving shelf orthogonal to the movement path is in the traveling direction of the movement shelf. 2. The direction of the attitude inclination of the moving shelf with respect to the moving path is determined by determining whether the moving side is ahead of, delayed, or not advanced or delayed. Moving shelf equipment as described in. The index path detection means includes a plurality of detection elements arranged in the left-right direction orthogonal to the movement path of the moving shelf,
The width shift direction of the moving shelf in the left-right direction perpendicular to the moving path is determined depending on which detecting element detects the index path among the plurality of detecting elements included in the index path detecting means. The moving shelf equipment according to any one of claims 1 to 8, wherein the moving shelf equipment is any one of claims 1 to 8.   The moving shelf equipment according to any one of claims 1 to 9, wherein the index path is made of a magnet, and the index path detecting means is a magnetic sensor. One side of the moving shelf in the left-right direction is the right side, the other side is the left side,
When the right side of the moving shelf is ahead of the left side, when it is delayed, when it is not leading or delayed, respectively, the leftward posture inclination, rightward posture inclination, no posture inclination,
When the width deviation occurs to the left of the moving path and when the width deviation occurs to the right, the width deviation direction is to the left and the width deviation direction is to the right,
The drive pattern that equalizes the rotation speed of each drive wheel is straight running,
The driving pattern that makes the rotational speed of the driving wheel provided on the right side of the moving shelf larger than the rotational speed of the driving wheel provided on the left side of the moving shelf is left turn,
As a right turn, a drive pattern that makes the rotational speed of the driving wheel provided on the right side of the moving shelf smaller than the rotational speed of the driving wheel provided on the left side of the moving shelf,
The moving shelf control means
The straight line when there is no width deviation and no posture inclination, or when the width deviation direction is rightward and the posture inclination is leftward, or when the width deviation direction is leftward and the posture inclination is rightward. Execute the driving pattern of traveling,
When there is no width deviation and the posture inclination is leftward, or when the width deviation direction is leftward and there is no posture inclination, or when the width deviation direction is leftward and the posture inclination is leftward, the right Executes the swivel drive pattern,
When there is no width deviation and the posture inclination is rightward, or when the width deviation direction is rightward and no posture inclination, or when the width deviation direction is rightward and the posture inclination is rightward, the left rotation is performed. The moving shelf equipment according to any one of claims 2 to 10, wherein a driving pattern of times is executed. In the control method of the movable shelf that is movable along the predetermined movement route on the bottom surface in the facility,
The moving shelf is controlled in advance by driving a driving wheel used for moving the moving shelf in any one of a plurality of predetermined driving patterns by a moving shelf control means for controlling the movement of the moving shelf. Move with one of the specified movement patterns,
An index path provided along the movement path is detected by an index path detection means provided on the movement shelf;
Based on the detection state of the index road by the index path detection means, the moving shelf control means causes the moving shelf control means to move the posture inclination of the moving shelf with respect to the movement path and to shift the width of the movement shelf in the left-right direction perpendicular to the movement path. Determine the direction,
The movement characterized in that the moving shelf control means selects one driving pattern to be executed from among a plurality of predetermined driving patterns in accordance with the posture inclination direction and the width deviation direction. Shelf control method. One of the left and right directions orthogonal to the moving path of the moving shelf is the left side, the other is the right side,
As a type of drive pattern of the drive wheel of the movable shelf, a first drive pattern for linearly moving the movable shelf, a second drive pattern for turning the movable shelf to the right, and a third drive for turning the movable shelf to the left Define the pattern,
When there is no width deviation and no posture inclination, or when the width deviation direction is rightward and the posture inclination is leftward, or when the width deviation direction is leftward and the posture inclination is rightward, Select one drive pattern,
When there is no width deviation and the posture inclination is leftward, or when the width deviation direction is leftward and there is no posture inclination, or when the width deviation direction is leftward and the posture inclination is leftward, 2 drive pattern is selected,
When there is no width deviation and the posture inclination is rightward, or when the width deviation direction is rightward and no posture inclination, or when the width deviation direction is rightward and the posture inclination is rightward, The method according to claim 12, wherein three driving patterns are selected.

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